Basic structure of human hair

There are tens of thousands of hairs on the human heads that grow from the hair follicles that are under the skin. In general, your hair grows approximately 1 cm per month. Hair and replacement are periodic. The normal hair growth cycle can be divided into three stages: long-term, degenerative and rest periods. During the growing season, the hair is released from the base of the hair follicle and can grow continuously for 2 to 4 years, until it is fully developed; 2-4 weeks, during which the hair stops proliferating actively.

Finally, the rest period lasts approximately 3 months, and the hair follicles in the hair begin to shrink, causing the hair to fall out. Then, a new hair begins to grow again, repeating another growth cycle. Your hair is often at different stages of the growth cycle, with detachment and growth in a dynamic equilibrium, with an average of around 100 hairs falling off each day. However, when the hair is separated and the newborn can not be maintained and the hair is scarce, this can be morbid. It is necessary to actively find the cause of hair loss, make a diagnosis and treat it correctly.

Scientists have discovered that genetic factors and a special hormone called dihydrotestosterone (DHT) are the main factors that lead to hair loss in men. Male pattern hair loss has a greater genetic predisposition. Studies have found that men with a genetic predisposition have a high concentration of a special hormone, dihydrotestosterone (DHT), in the scalp of the head and anterior alopecia. And this DHT can make the hair follicles shrink, shorten the hair growth cycle, and make the hair soft, scattered and fall out. So, how is DHT synthesized? The study found that a protease called 5alpha-reductase in the body transfers testosterone (another hormone) to DHT, while men with a congenital 5alpha-reductase deficiency do not develop hair loss, further confirming this. The key role of enzymes in the future treatment of hair loss.